Apparatus for the automatic supply of cooling-water to grinding-wheels.



P. HEIMBERG. APPARATUS FOR THE AUTOMATIC SUPPLY OF COOLING WATER T0 GRINDING WHEELS. APPLICATION FILED we. 26, 1912.

1,088,277. Patented Feb. 24, 1914.

UNITED STATES PATENT OFFICE.

PAUL HEIMBERG, OF DUSSELDORF, GERMANY, ASSIGNOR TO THE FIRM OF VEBEINIGTE CARBOBUNDUM- UND ELEKTRIT-WERKE AKT. GES., 0F VIENNA,

AUSTRIA-HUNGARY.

APPARATUS FOR THE AUTOMATIC SUPPLY OF COOLING-WATER TO GRINDING- WHEELS.

Spee'ification of Letters Patent. .Patented Feb, 24, 1914.

Application filed. August 26, 1912. Serial No. 717,005.

To all whom it may concern:

Be it known that I, PAUL HEIMBERG, mechanical engineer, a subject of the Emperor of Germany, residing in Himmelgeisterstrasse 95, Dusseldorf, Germany, have invented certain new and useful Improvements in Apparatus for the Automatic Supply of Cooling-Water to Grinding-Wheels; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilledv in the art to which it appertains to make and use the same.

Apparatus for the automatic supply of cooling water to grinding wheels, bymeans of a wheel dipping into water is already known. For this purpose smooth wheels were used as feeding devices, which partly dip into water and the circumference of which comes into contact with the circumference of the grinding disk whereby it is intended to cause the moistening of the latter. It is obvious that the moistening of the grinding wheels can be only very imper fectly effected thereby. For regulating the supply of the water and for adapting 1t to the various kinds of grinding work performed on the grinding Wheel, it has been proposed heretofore to arrange an adjustable plate between a smooth wheel for conveying the water and the grinding wheel, this plate projecting outside of the wall of the receptacle for the water and being adapted to be shifted lengthwise in one direction or the other through an aperture of the re: ceptacle. However, this aperture has been disposed in the trajectory of the water thrown against the grinding wheel, and such an arrangement has the disadvantage in operation that if the aperture does not tightly fit about the regulating plate, water will escape through it and the receptacle will have to be frequently refilled; or, on the other hand, if the aperture fits tightly around the plate, the mud or mire depositing upon the plate interferes with the nice adjustment for regulating the portion of the water which reaches the grinding wheel.

According to the present invention a small vane wheel dipping into cooling water is used as a device for supplying the water,

which lifts the latter and throws it against the grinding wheel. This vane wheel is preferably operated from the axle of the grinding wheel by any transmitting means, such as a cord, belt, chain or cogwheel; so that the supply of cooling water may be made dependent on the motion of the grinding disk. By means of the vanes or blades of the wheel there are suflicient quantities of water constantly thrown against the grinding wheel as required and as the water receptacle is arranged below the grinding wheel the superfluous water always flows back, so that the re-filling of the water receptacle only becomes necessary after several days. The vanes or blades of the wheel may be detachably attached, so that they may be exchanged for vanes or blades of smaller or larger size, if at any particular grinding operation less water or more water should be required. However, as the method of regulation of the water supply is somewhat tedious, especially, when the amount of water to be supplied has to be changed frequently, there may be arranged a screen disposed between the grinding wheel and the means of supply which may be the vane wheel as described or disks, chains or the like. This screen may be adjusted from the outside by means passing through the wall -of the receptacle outside of the trajectory of the water thrown against the grinding wheel, so that the disadvantages of prior constructions hereinbefore mentioned are eliminated. By the adjustment of the screen the section or area of the passage available for the water may be increased or decreased, or the water may be entirely out off; This screen may be constructed in various forms, for instance it may consist of a plate, or of a drum of sheet metal surrounding the supply device, and provided with a number of successive perforations as well as with a blank section having no holes, the total section of passage of the perforation increasing in zones to a zone which is entirely open. Therefore, by a suitable adjustment of this plate or drum, the water supply may be intercepted, or a small or medium quantity of water may be supplied, or if desired, the maximum quantity may be supplied, according as to whether the unperforated part, an

. intermediate zone of perforations, or the enparts in the Fig. 2 is a side view of the'water feeding and is driven from the cord device and itsdriving arrangement. Fig. 3 shows a detail view of the regulating device which will be more fully described hereinafter.

A water receptacle 6 is arranged beneath a grinding wheel a, in which receptacle an axle c is mounted which carries a small vanewheel (Z in the plane of revolution of the grinding wheel. A cord pulley e is situated on the axle 0 outside the water receptacle Z), pulley f on the axle of the grinding wheela. .The water receptacle 6 is filled with water so far that the lower part of the same wheel-d dips into it in order that on the rotation of the grinding wheel a: the vane wheel d is also driven, and water is lifted by means of the Wheel (2 and thrown against the circumference of the grinding wheel a. In case there is no' other regulating device provided for the water supply, the vanes ofthe wheel d may be interchangeable so that smaller or larger vanes maybe mounted as desired, whereby the quantity of water lifted and thrown against the grinding wheel a may be regulated. However, in the form of construction' illustrated in the drawings the vane wheel a? is surrounded by a drum 9 of sheet 'metal, which is connected to an axle h adapted to be rotated in both directions by-a handle 2' arranged outside the receptacle b. This axle It lies in a stufiing box v outside of the trajectory of the water thrown against the grinding wheel. The circumference of 'thisdrum g is shown developedin Fig. 3. A part is of the circumference of this drum is unperforated, then follows a group of holes Z, m, 'n, which have a certain sectional area which is not very large; then follows a group of larger perforations 0, p, g, which have a larger sectional area, and then follows a large perforation of hole 1'; According to the adjustment of the drum 9 the water thrown by the vane wheel d toward the grinding wheel a is thrown either toward the part A: of the drum, or toward the series of holes Z, 772., n or the series 0, p, g, or the opening 1, so that it is either intercepted, more or less thrott-led or allowed to pass freely to the circumference of the grinding wheel. It is thus obvious, that means are provided whereby the quantity of cooling water may be regulated at any time according to thework inhand, or if desired the grinding may take place on a dry surface.

The sheet metal drum g may be held in any position by a clamping screw 8.

Of course instead of the sheet metal drum illustrated, any other screen or throttle arrangement may be used, which alters the sectional area for the passage of the water, and generally the constructive formation of the arrangement may be subject to various modifications within the limit of the principle set out at the commencement.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In an apparatus for the automatic supply of water to grinding wheels, the combination with a rotatable grinding wheel, and a receptacle containing water, of means for throwing water from the receptacle against the grinding wheel, an adjustable screen interposed in the trajectory of the water and adapted to throttle a regulable portion of the water, and screen adjusting means passing from outside to within the receptacle through an opening outside of the trajectory of the water; substantially as described.

2. In an apparatus for the automatic supply of water to grinding wheels, the combination with a rotatable grinding wheel, and a receptacle containing water, of a rotatable vane-wheel arranged to dip into the water in the receptacle, an adjustable screen between the grinding wheel and the vanewheel for throttling a regulable portion of the water, screen adjusting means arranged outside the receptacle and connected to the screen by an operative connection passing through the wall of the receptacle through an aperture outside of the trajectory of the water thrown against the grinding wheel, and means for driving the grinding wheel and the vane-wheel; substantially as described. 7

8. In an apparatus for the automatic supply of water to grinding wheels the combi nation of a grinding wheel with a water receptacle a vane-Wheel dipping partly into the vane-Wheel substantially as and for the the water, an adjustable drum-shaped screen purpose described. 10 surrounding the said Vane-Wheel and pro- In testimony whereof I aflix my signature, vided upon its surface with an unperit'orated in presence of two Witnesses.

part and successive Zones of perforations, PAUL T-IEIMBERG. [n.s]

the sectional area of each zone increasing Witnesses:

gradually to an entirely open zone and HELEN NUFER,

means for driving the grinding Wheel and ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. i 

